Driving-gear



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T. G. ROBINSON, Jr.

DRIVING GEAR. No. 517,303. Patented Mar. 27, 1894.

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T. C. ROBINSON, Jr.

DRIVING GEAR.

N0. 517,303. Patented Mar. 27, 1894.

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UNITED STATES 'ATE T Fries.

THOMAS CHALKLEY ROBINSON, J R., OF IPAYA, ILLINOIS.

DRIVING-GEAR.

SPECIFICATION forming part of Letters Patent No. 517,303, dated March 27, 1894.

Application filed June 17, 1893.

To all whom it may concern:

Be it known that I, THOMAS CHALKLE ROBINSON, J r., of Ipava, in the county of Fulton and State of Illinois, have invented a new and Improved Driving-Gear, of which the following is a full, clear, and exact description.

The invention relates to traction engines, and its object is to provide a new and innproved driving gear which is durable and comparatively simple in construction, very effective in operation, and arranged to run the engine with more power and less speed when going over rough roads, up hills, &c., and with increased speed when traveling over smooth and comparatively level roads.-

The invention is embodied in the construction, arrangement, and combination of parts hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a side elevation of the improvement as applied and arranged for high speed. Fig. 2 is a plan view of the same. Fig. 3 is a side elevation of the improvement with parts removed and as arranged for power and slow speed. Fig. 4 is a side elevation of a modified form of the improvement. Fig. 5 is a sectional plan view of part of the improvement on the line 5-5 of Fig. 3; and Fig. 6 is a transverse section of the same on the line 6-6 of Fig. 5.

The traction engine on which theim proved driving gear is applied is provided with the usual boiler A on the top of which is journaled, in suitable bearings, the main driving shaft B carrying a crank arm B connected in the usual'manner with the engine proper located on the boiler A. On the shaft B is mounted to rotate loosely a sleeve 0 adapted to be connected with'the said main driving shaft B by a suitable clutch device D under the control of the operator, and serving to lock the sleeve 0 to the shaft B to rotate with the latter.

On the sleeve 0 are secured two gear wheels E and E, of different diameters, the larger gear wheel E being adapted to be thrown in mesh with a gear wheel F mounted to rotate on a stud F secured to a slide G mounted to Serial No. 477.986. (No model.)

move obliquely in a suitably arranged guide way H bolted or otherwise secured to the shell of the boiler A. This gear wheel F isadapted to mesh in a gear wheel I at the time it is in mesh with the gear wheel E, see Fig. 1, the said gear wheel I being secured on a transverselyextending shaft I carrying on each end a pinion I in mesh with an internal gear wheel J secured or formed on the corresponding drive wheel J of the traction engine. The gear wheel I is adapted to be engaged by the smaller gear wheel K of a double gear wheel K formed with a larger gear wheel K and mounted to rotate loosely on a stud K secured to the slide G above mentioned, it being understood that when the said slide is shifted to move the gear wheel F out of mesh with the gear wheels I and E, then the small gear Wheel K of the double gear wheel K moves in mesh with the gear wheel I and at the same time the other gear wheel K of the double gear wheel K moves in mesh with the smaller gear wheel E on the sleeve 0. If desired, the slide G can be moved to the position shown in Fig. 4, so that neither of the gear wheels F or K is in mesh with the gear Wheel I, consequently no rotary movement is imparted to the said gear wheel I and consequently to the drive wheels, from the main driving shaft B.

In order to impart the necessary sliding mo tion to the slide G, I pivotally connect the upper end of the same with a lever L fulcrumed on a bracket projecting from the guideway H. The lever L is pivotally-con= nected at its free end by a link N with a shifting lever O fulcrumed on a stud O secured to the side of the boiler A. The lever O is adapted to be locked to a notched segment P also secured to the boiler A, the locking mechanism consisting of the usual hand lever Q held on the handle end of the shifting lever 0. Thus, when the lever 0 is in the position as illustrated in Fig. 1, the slide G is in such a position that the gear wheel F meshes into the gear wheels I and E while the other gear wheel K is out of mesh with the gear wheel I and its companion wheel K is out of mesh with the gear wheel E. Now, when the operator moves the lever O to the left into the position shown in Fig. 3, then the slide G is moved upward in its guideway H so that the gear wheel F is moved out of mesh with the gear wheels I and E, and the double gear gear wheel I. When the lever O is moved into the intermediate position, shown in Fi 4, then neither of the gear wheels F or K is in mesh with the gear wheel I, as before mentioned.

In order to securely lock the slide G in place in its bearing II in any of the three positions above described I provide the following looking device: The hand lever Q is pivotallyconnected by a link R with a bell crank lever B. fulcrumed on the stud 0' which formsthe fulcrum forthelever O. The bell crank lever R is pivotally'oonnected by a link Swith a second bell crank leverT fulcrumed on the guide way II and carrying a bolt U, fitted to slidein the guideway H and adapted to engage apertures G, G2 and G formed in the slide G, see dotted lines, Figs. 3 and I. That is, when the lever O is in the position as shown in Fig. 1, the bolt U engages the aperture Gin the slide G to lock the latter to the guide-way to prevent disengagement of the gear wheels F, I and E. When the lever O is moved into the position shown in Fig. 3, the bolt Uengages the aperture G2 to lock the slide in place and when the lever O is moved to the intermediateposition shown in Fig. 4, then the bolt engages the aperture G located between the apertures G and G Instead of operating the bell crank lever T from the bell crank lever B and handle Q, as above described,l may coir nect the bell crank lever 'l by a link V with a shifting lever V adapted to be located on a segment V held on the boiler A; see Fig. 4. In this case, the operator has to manipulate first the shifting lever V to unlock the slide G before he can move the lever O to shift the position of the slide, as above described. In the construction shown in Figs. 1 and 3, however, the unlocking of the lever 0 produces a simultaneous unlocking of the boltU so that when the shifting lever O is unlocked the slide Gis also unlocked. Now, it will be seen that bythe arrangement described therotary motion imparted by the engine to the main shaft Bean be transmitted bythe clutch D to the sleeve Cso that the latter, byeither of its gear wheels E or E, can impart more power and less speed to the traction engine when going over rough roads or up hill at the time the gear wheel F is in mesh with the gear wheels I and E, or an increased speed can be given to the engine when traveling over smooth and level roads at the time the gear wheels I and E are connected with each other by the double gear wheel K.

The gear wheels E E instead of being mounted on the sleeve 0 may be directly secured on the shaft 13. In this case the clutch device D is dispensed with. It is understood that the several cog wheels can be so proportioned as to give any desired fast and slow speed.

Having thus fully described my invention,

I claim as new and desire to secure by Letters Patent- 1. The combination with guideways and the fixed driving and driven gears of a slide, G, arranged for adjustment in such guide-ways between said gears, and a single gear wheel and double gear wheel j ournaled on said slide at diili'erent points, so that they are engaged or disengaged with the fixed gears as shown and described to operate as specified.

2. A driving mechanism for traction ongines, comprising two differential gear wheels adapted to be driven from the main driving shaft,a single gear wheel adapted to be thrown in mesh withthe largest of the said gear wheels, a double gear wheel having its largest wheel adapted to engage the smallest gear wheel of the said diiferential gear wheels, a slide carrying the said single gear wheel and the said double gear wheel, and a driven mechanism provided with a large gear wheel adapted to be engaged with the said single gearwheel or by the said larger gear wheel of the double gear wheel, substantially as shown and described.

A driving mechanism for traction engines, comprising two differential gear wheels adapted to be driven from the main driving shaft, a single gearwheel adapted to bethrown in mesh with the largest of the said gear wheels, at double gear wheel having its largest wheel adapted to engage the smallest gear wheel of the said differential gear wheels, a slide carrying the said single gear wheel and the said double gear wheel, a driven mechanism provided with a large gear wheel adapted to be engaged with the said single gear wheel or by the said larger gear wheel of the double gear wheel, a guideway for the said slide, and a shifting lever connected with the said slide to inrpart movement theretoin its guideway, substantially as shown and described.

4. A driving mechanism for traction engines, comprising two differential gear wheels adapted to be driven from the main driving shaft, a single gear wheel adapted to be thrown in mesh with the largest of the said gear wheels, a double gear wheel having its largest wheel adapted to engage the smallest gear wheel of the said differential gear wheels, a slide carrying the said single gear wheel and the said double gear wheel, a driven mechanism provided with alargegear wheel adapted to be engaged with the said single gear wheel or by the said larger gear wheel ofthe double gear wheel, a guideway for the said slide, a shifting lever connected with the said slide to impart movement thereto in its guideway, and a locking mechanism as described, for fastening the said slide in place in its guideway, substantially as shown and described.

THOMAS (lllALKhEY ROBINSON, JR. 

